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Table 3 Image quality NEMA results for the 4:1 contrast ratio (3D OP-OSEM+PSF + TOF, 4 iterations, 5 subsets, no post-filtering)

From: From a PMT-based to a SiPM-based PET system: a study to define matched acquisition/reconstruction parameters and NEMA performance of the Biograph Vision 450

  Contrast recovery (%) Background variability (%)
Matrix size 220 × 220 440 × 440 220 × 220 440 × 440
Sphere diameter (mm)     
 10 75.4 83.3 (94.4) 5.3 6.3 (9.5)
 13 78.4 82.4 (88.0) 4.4 5.0 (7.3)
 17 91.0 93.2 (96.5) 3.4 3.7 (5.2)
 22 96.3 98.7 (101.8) 2.7 2.7 (3.8)
 28 76.7 77.6 (84.6) 2.3 2.3 (3.1)
 37 83.2 84.1 (89.9) 1.9 1.9 (2.5)
Average lung residual (%) 5.5 5.5 (3.2)   
  1. Results obtained using 8 iterations, 5 subsets, and no post-filtering are reported within brackets. These values could be directly compared to those reported in Table 3 in [9], for the 10, 13, 17, and 22-mm spheres